41 lines
1.3 KiB
Go
41 lines
1.3 KiB
Go
// +build go1.7
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// ^^^^^^^^^^^^ we use the "sub-benchmark" feature that was added in Go 1.7
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package cryptocore
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import (
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"fmt"
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"testing"
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)
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/*
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The troughput we get from /dev/urandom / getentropy depends a lot on the used
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block size. Results on my Pentium G630 running Linux 4.11:
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BenchmarkRandSize/16-2 3000000 571 ns/op 27.98 MB/s
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BenchmarkRandSize/32-2 3000000 585 ns/op 54.66 MB/s
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BenchmarkRandSize/64-2 2000000 860 ns/op 74.36 MB/s
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BenchmarkRandSize/128-2 1000000 1197 ns/op 106.90 MB/s
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BenchmarkRandSize/256-2 1000000 1867 ns/op 137.06 MB/s
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BenchmarkRandSize/512-2 500000 3187 ns/op 160.61 MB/s
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BenchmarkRandSize/1024-2 200000 5888 ns/op 173.91 MB/s
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BenchmarkRandSize/2048-2 100000 11554 ns/op 177.25 MB/s
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BenchmarkRandSize/4096-2 100000 22523 ns/op 181.86 MB/s
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BenchmarkRandSize/8192-2 30000 43111 ns/op 190.02 MB/s
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Results are similar when testing with dd, so this is not due to Go allocation
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overhead: dd if=/dev/urandom bs=16 count=100000 of=/dev/null
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*/
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func BenchmarkUrandomBlocksize(b *testing.B) {
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for s := 16; s <= 8192; s *= 2 {
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title := fmt.Sprintf("%d", s)
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b.Run(title, func(b *testing.B) {
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b.SetBytes(int64(s))
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for i := 0; i < b.N; i++ {
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RandBytes(s)
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}
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})
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}
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}
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